"I am a little short on time this week to develop, but hope to get some time for it next week.
There is not much logging in the code, I usually test it visually by aiming at a star"

You might consider making a simple artificial star. As simple as a light source in a box with a pin hole into some aluminium cooking foil. Along with a short telescope like a spare finder/guider scope or even a camera you now have a controlled source without the vagueries of the weather or indeed time of day since It is important to keep FL short if you need a short subject to camera distance for use indoors for example.

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